What is a PDF?
A PDF is a document in Portable Document Format, a format created by Adobe Inc to
allow easy exchange of documents. A PDF describes a page in a non-device specific
method, meaning that the PDF will appear the same on any device. What you see displayed
on the screen in Adobe Acrobat or Adobe Reader is the same thing that will be printed
on your printer, within the limits of the device. PDFs can be either fillable, or
non-fillable.